Damper device

Abstract

Provided is a damper device capable of increasing torque of a coil spring without increasing an outer diameter of a case. The damper device includes the case ( 2 ), a shaft ( 3 ) that is relatively rotatable with respect to the case ( 2 ), fluid filled in a damper chamber ( 5 ) formed between the case ( 2 ) and the shaft ( 3 ), a bearing member ( 4 ) that forms a partition wall ( 5 a ) that closes one end of the damper chamber ( 5 ) in an axial direction and is separate from the shaft ( 3 ), and a coil spring ( 9 ) having one end connected to a side of the case ( 2 ) and the other end connected to the shaft ( 3 ) or the bearing member ( 4 ) to apply torque to the shaft ( 3 ) with respect to the case ( 2 ). The bearing member ( 4 ) is arranged between a winding portion ( 9 a ) of the coil spring ( 9 ) and the damper chamber.

What is claimed is: 
     
       1. A damper device comprising:
 a case, 
 a shaft that is relatively rotatable with respect to the case, 
 fluid filled in a damper chamber formed between the case and the shaft, 
 a bearing member that forms a partition wall that closes one end of the damper chamber in an axial direction and is separate from the shaft, and 
 a coil spring having one end connected to a side of the case and the other end connected to the shaft or the bearing member to apply torque to the shaft with respect to the case, 
 wherein the bearing member is arranged between a winding portion of the coil spring and the damper chamber, and the winding portion of the coil spring and the damper chamber are separated from each other in the axial direction, 
 wherein a sliding sealing member is arranged between the bearing member and the shaft that is rotatable with respect to the bearing member, and a fixed sealing member is arranged between the case and the bearing member that is non-rotatable with respect to the case. 
 
     
     
       2. The damper device as claimed in  claim 1 , wherein a sliding sealing member is arranged between the case and the bearing member that is rotatable with respect to the case, and the shaft is non-rotatable with respect to the bearing member. 
     
     
       3. The damper device as claimed in  claim 2 , wherein the shaft, the bearing member and the coil spring are inserted into the case in the same direction. 
     
     
       4. The damper device as claimed in  claim 2 , further comprising a lid member screwed onto an inner surface of the case and a spring holding member that is sandwiched between the lid member and the bearing member and is non-rotatable with respect to the case and movable in the axial direction. 
     
     
       5. The damper device as claimed in  claim 1 , wherein the shaft, the bearing member and the coil spring are inserted into the case in the same direction. 
     
     
       6. The damper device as claimed in  claim 5 , further comprising a lid member screwed onto an inner surface of the case and a spring holding member that is sandwiched between the lid member and the bearing member and is non-rotatable with respect to the case and movable in the axial direction. 
     
     
       7. The damper device as claimed in  claim 1 , further comprising a lid member screwed onto an inner surface of the case and a spring holding member that is sandwiched between the lid member and the bearing member and is non-rotatable with respect to the case and movable in the axial direction. 
     
     
       8. The damper device as claimed in  claim 1 , wherein the shaft, the bearing member and the coil spring are inserted into the case in the same direction. 
     
     
       9. The damper device as claimed in  claim 1 , further comprising a lid member screwed onto an inner surface of the case and a spring holding member that is sandwiched between the lid member and the bearing member and is non-rotatable with respect to the case and movable in the axial direction.